All tools

IP and device

• What is my IP address? Your public IP, location and internet provider.
• IP WHOIS and ASN lookup Who an IP address or AS number belongs to.

Domain names

• WHOIS lookup Who registered a domain, and when it expires.
• Is this domain available? Check a name across every extension at once.
• SSL certificate check When a site's certificate expires, and who issued it.
• HTTP headers and redirects Status codes, redirect chain and security headers of a URL.

DNS and email

• DNS lookup A, MX, NS, TXT and other records of a domain.
• DNS propagation check Your DNS records as resolvers in 20 countries see them.
• Email security check SPF, DKIM, DMARC and MX records, with a record generator.
• Email header analyzer Where did an email come from, and is it genuine?
• Blacklist check Is an IP address on spam blacklists (DNSBL)?

Network

• Internet speed test Download, upload and ping in about 20 seconds.
• Ping and MTR Response time and packet loss from 13 countries.
• Traceroute The path your data takes to a website, hop by hop.
• Open port checker Check your open ports, and what each port is for.
• Subnet calculator Network, mask and host range of any IPv4 subnet.
• MAC vendor lookup Which company made the device with this MAC address?
• Network planner Plan IP addresses and draw the network diagram.

Privacy and security

• WebRTC leak test Does your browser reveal your real IP through WebRTC?
• Password leak check Has this password appeared in a data breach?
• Reverse image search Where else does this picture appear online?
• Disposable email A throwaway inbox for sign-ups and verification codes.